Run tbe same test at base ISO. Raising the ISO to 800 will affect the sensor's ability to resolve detail and make it harder to spot any difference between lenses. Having said that, we are well past the point in lens design where it is correct to assume that a prime lens will always be sharper than a zoom lens at the same settings.

Run tbe same test at base ISO. Raising the ISO to 800 will affect the sensor's ability to resolve detail and make it harder to spot any difference between lenses. Having said that, we are well past the point in lens design where it is correct to assume that a prime lens will always be sharper than a zoom lens at the same settings.

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Agreed, but it is still a surprise to find an inexpensive zoom get close to an excellent prime lens even if it is only in limited conditions.